Fluid-pressure motor



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y UNITED- STATES PATENT Fnicn. v

PETTER O. N. PEDERSON, OF VEST SUPERIOR, VISCONSIN.

FLUID-PRESSURE IVIOTOR.,V

SPECIFICATION forming part of Letters Patent N 0. 596,614, dated January 4, 1898. Application tiled February 17, 1897. `Serial No. 623,854. (No model.)

To all whom t may concern: i Y

Be it known that I, PETTER C. N. FEDER--` SON, a citizen of the United States, residing at West Superior, in the county of Douglas and State of Wisconsin, have invented a new -and useful Fluid-Pressure Motor, of which the following is a specification. Y Y My invention lrelates to Huid-pressure mo tors adapted to utilize the expansive force of upon the same piston or to cause simultaneous operation of the motive agent upon different piston-heads connected by a common carrier or piston-rod.

Further objects and advantages of this in- Vention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure l is a vertical lon-` gitudinal section of a motor constructed in accordance with my invention, one of the eX- pansion-chambers and contiguous parts being shown in section and another in elevation. Fig. 2 is a detail View in perspective of the inlet end of one of the expansion-chambers, including the gate-locks and valve mechanism. Fig. 3 is an end view of the same, partly broken away to show the trips of the advance gate-locks. Fig. 4 is a horizontal sectional view of the same. Fig. 5 is a detail view in perspective of one of the advance-gateflock trips detached. Fig. 6 is a similar view of one of the reverse gate-locks detached. Fig. 7 is a detail view of the packing-strip and cooperating blocks used in connection with the wings of the gates. Fig. 8 is a plan view of one of the pistons. Fig. 9 is a transverse vertical section of the same. Fig. 10 is a detail view in perspective of an arm of one of the carrier guides or wheels. Fig. 1l is a similar view of contiguous connected links of one of the carrier members.

Similar numerals of reference indicate corresponding parts in all the iigures of the drawings.

The mechanism embodying my invention includes V a straight cylinder or expansionchamber 1, at the inlet end of which are arranged duplicate opposite cooperating gates 2, each having a plurality 'of wings 3, said gates being adapted to rotate in opposite directions, as indicated by the arrows in Fig. l at a, to successively bring the contiguous win gs in vertical or transverse alinem ent, with their contiguous edges approximately in contact, and thereby form a iixed abutment, between which andV the moving abutment formed by the piston-head 4 is admitted the motive agent by means of an inlet-valve 5, controlling an inlet-port 6, preferably arranged in the side of the chamber contiguous to the plane of the xed abutment. Motive agent is admitted to the valve-chamber 7-by means of a supply-pipe or conductor 8.

A plurality of piston-heads are supported by a common carrier 9, which is of endless and flexible construction and traverses suitable spaced guides 10, which in the construction illustrated consist of wheels. ll of these wheels are provided with inwardlyextending webs 12, having terminal seats 13,

'which are constructed cross-sectionally to correspond with the half-section of the carrier member, the carrier comprising any desired number of carrier members, which in the construction illustrated consist of jointed rods. The carrier members are shown in the drawings as being of round construction, and each member is sectional to form a plurality of links connected in series with interlocking joints Aor hinges, as shown at 14.

The piston, which comprises the piston- -heads 4 and the carrier to which they are attached, moves in the direction indicated by the arrow b in Fig. 1,-and as the 'piston-heads successively enter the expansionchamber through the end fitted with the oppositelyrotatable gates 2 the latter turn through an arc equal to the number of degrees of a circle comprehended between the extremities of the wings, and therefore with gates provided The arms IOO with four wings, as in the construction illustrated, the gates will move at each operation through an arc equal to ninety degrees, and as subsequent to each movement of the gates the motive agent is admitted to the expansionchamber between the fixed abutment formed by the coacting or alined wings of the gates and the piston-head which has just entered the expansion-chamber it is necessary to employ means for preventing the backward rotation or reverse movement of the gates. The means employed for this .purpose consist of reverse gate-locks 15, mounted in suitable guides in opposite side walls of the expansionchamber and projecting at their inner edges in rear of the alined or operative wings of the gates, said locks having the rear sides of their projecting edges beveled, as shown at 16, to receive the pressure of the extremities of the piston-head which is about to enter the expansion-chamber, whereby said locks may be repressed out of the path of such piston-head, the length of the piston-head being equal to the width of the expansion-chamber. These reverse gate-locks are yieldingly held in their normal or operative positions with relation to the operative wings of the gate by means of springs 17. (Shown clearly in Fig. 2.) It is also desirable to prevent excessive forward or advance rotation of the gates, whereby they may be positively stopped when they reach a position in which the contiguous wings are in alinement, and hence are adapted to form the-fixed abutment for the succeeding operation of the motive agent, and the means which I have devised for accomplishing this purpose consist of advance gate-locks 1S, arranged in the paths, respectively, of those wings which, after having served as fixed abutments, have been moved by the entrance of a piston-head into an inoperative position out of the path of the said entering pistonhead to complete the top and bottom walls, respectively, of the expansion-chamber, (also shown in Fig. 1,) the contiguous edges of said top and bottom walls, which havel been cut away to allow the said movement of the wings of the gates, being provided with projections 19 to fit in and snugly close the notches 20, formed in the meeting edges of the wings to allow the passage of the carrier members. These advance gate-locks are also yieldingly held in their operative positions, as by means of springs 2l, and in the construction illustrated the pair of advance gate-locks which I preferably use at each side of the expansionchamber are connected for simultaneous operation by a frame comprising a slide 22, having arms 23, said arms projecting from the extremities of the slide and being terminally attached to the locks. Any suitable means may be employed for guiding the slide-such as spurs 24, fitting in suitable seats in the side walls of the expansion-chamber. In connection with this construction I also employ a trip 25, mounted in a guide in the side wall of the expansion-chamber and connected to the slide or yoke, the,actuating-spring21 being arranged to bear directly against the trip, and the latter, which projects at-its inner edge beyond the inner surface of the side wall of the expansion -chamber, being beveled, as shown at 26, for contact with the contiguous extremity of the piston-head. I-Ience as the piston-head enters the front or receiving end of the expansion-chamber it first actnates the trips 25 and thereby disengages the advance gate-locks from the gate-wings, and while holding the advance gate-locks in their retracted position the piston also trips the return gate-locks and bears against the alined orvoperative wings of the gates. The continued advance movement of the piston-head then causes the gates to swing upon their parallel axes and brings the succeeding wings into operative position in rear thereof preparatory for the admission of motive agent to give an impulse to the recently-entered piston-head. The trips 25 are limited as to inward movement under the impulse of the actuating-springs 21 by means of terminal stop-ears 251. (See Figs. 3 and 5.)

As above described, the meeting edges of the gate-wings are cut away or notched to receive the piston-carrier members, and in order to prevent leakage of the motive agent around the piston-carrier members and also in the joints between the alined piston-wings the latter are provided with edge packingstrips 27, yieldingly held in operative position by actuating-springs 28 and limited in extension by stop-pins 29, engaging suitable slots in the strips, said strips having notches 30 for the reception of the carrier members. The strips are also provided with independently-movable members or blocks 31, provided with concaved faces 32, said independently-movable members or blocks being let into cavities 33 in the strips and being yieldingly held in their operative position in close contact with the carrier members by means of independent actuating-springs 34. These independent members or blocks 3l are also limited as to extension by pins 35, engaging suitable slots. End packing-strips 36 are 'also employed in connection with the gatewings, the contiguous extremities of the edge packing-strips 27 and end packing-strips 36 being halved and overlapped, as shown. Furthermore, the piston-heads are provided with packing-strips 37, actuated by springs 38, and in order to break the shock of the contact of the piston-heads with the operative wings of the gates I employ cushion-springs 39, preferably reinforced by an inclosed auxiliary spring 40.

Any suitable construction of valve mechanism may be employedA in connection with the devices above described; but that which I have found to be eflicient consists of a rocker 41, of bell-crank-lever construction, of which one arm is connected by a link 42 with the valve-stem 43, while the other arm is provided with a pin 44, operating in a cam-groove 45.

IIO

The cam when used in connection with one of the guides l0 is preferably made as a groove, (see Fig. 1 5) but itis obvious that a cam driven by or operating in connection with the pistons may be substituted therefor without departing from the'spirit of this invention.

From the above description it will be seen that the piston, which comprises the series of spaced piston-heads and a con necting-carrier, may be used in connection with one or more expansion-chambers to receive a continuous motion ,in a uniform direction, the construction illustrated in the drawings embodying two expansmn-chambers arranged at opposite sides of the carrier and receiving the pistonheads successively; but it is obvious that in j order to increase the power the number of eXpan sion-chambers cooperating with the piston may be multiplied; and, furthermore, it will be seen that the utility of the mechanism as described is not limited to any particular motive agent, either steam, compressed air, gas exploded at the proper intervals by means ,not shown but well known in the art, or any equivalent of these expansive agents being applicable to the mechanism as set forth.

Inasmuch as the exhaust from each expansion-chamber occurs at the outlet end thereof andfollows the piston-head, it will be seen that the expansive force of the motive agent is exerted upon the piston-head throughout the travel of the latter, and in order to control the exhaust the number of expansionchambers desired for a particular motor may be arranged, as shown in the drawings,within a common casing 46, provided with an eX- haust-port 47, said casing being supported by suitable standards 4S or their equivalents.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I claim is- -l. A fluid-pressure motor having an expansion-chamber, a piston comprising a plurality of flexibly-connected piston-heads adapted to pass successively through the expansionchamber in a common direction, cooperating movable gates located at the inlet end of the expansion-chamber and adapted to be actuated by the successive engagement of the piston-heads therewith, to open the inlet end of the expansion-chamber for the passage of the piston-heads, and gate-locks for normally holding the gates in theiil closed or adjusted positions, and having trips for engagement by the piston-heads, whereby the gates are released preparatory to Contact therewith of a piston-head, substantially as specied.

2. A fiuid-pressure-motor having. an expansion-chamber, a piston comprising a plurality of flexibly-connected piston-heads adapted to pass successively through the expansionchamber in a common direction, cooperating opposite swinging gates located at the inlet end of the expansion-chamber and adapted to be actuated by the successive engagement of the piston-heads therewith, to open the inlet end of the expansion-chamber for the passage of the piston-heads, and gate-locks for normally holding the gates in their closed or adjusted positions, and having trips for engagement by the piston-heads, whereby the gates are released preparatory to contact therewith of a piston-head, substantially as specified.

3. A fluid-pressure motor having an expansion-chamber, a piston comprising a plurality of iieXibly-connected piston-heads adapted to pass successively through the expansionehamber in a common direction, cooperating revoluble winged gates located at ,the inlet end of `the expansion-chamber and adapted to be turned to allow the entrance of the piston-heads at intervals, by the successive contact of the piston-heads with the operati ve or alined wings of the gates, and cushion-springs carried by the piston-heads in advance of their front sides, for contact with the wings, substantially as specified.

4. A duid-pressure motor having an expansion-chamber, a piston comprising a plurality of spaced ieXibly-connected piston-heads adapted to pass successively through the exparisien-chamber in a uniform direction, cooperating revoluble winged gates disposed at the inlet end of the expansion-chamber and adapted to be actuated by the successive engagement of the piston-heads with the operative or alined wings of the gates, and gatelocks forA normally holding the gates in their adjusted positions against rotary movement, and having trips forengagement by the piston-heads, whereby the gates are released preparatory to the entrance of a piston-head, substantially as specified.

5. Aiiuid-pressure motor having an eXpansion-chamber, a piston comprising a plurality of spaced iiexibly connected piston heads adapted to pass successively through the eX- pansion-chamber in a uniform direction, cooperating revoluble winged gates disposed at the inlet end of the expansion-chamber and adapted to be turned to remove their operative or alined wings from the path of an entering piston-head, and advance and reverse gate-locks engaged with the gates to normally hold them in their adjusted positions, and having means disposed in the path of the piston-heads, for engagement thereby, to release the gates, substantially as specified.

6, A fluid-pressure motor having an expansion-chamber, a piston comprising a plurality of spaced iiexiblyconnected piston heads adapted to pass successively through the expansion-chamber in a uniform direction, cooperating revoluble winged gates disposed at the inlet end of the expansion-chamber and normally arranged with corresponding wings in alinement to form a xed abutment, means for temporarily locking the gates in their ad- IOO IIO

at intervals to allow the entrance of the piston-heads,and yielding packin g-stri ps carried by the gate-Wings, the edge strips being provided with independently-movable members or blocks, having independent actuating devices and having their faces constructed to correspond with the cross-sectional construction of the connection between the pistonheads, substantially as speciiied.

7. A fluid-pressure motor having an expansion-chamber, provided With an inlet-port, a piston comprising a plurality of spaced ilexibly-connected piston-heads adapted to pass successively through the expansion-chamber in a uniform direction, cooperating revoluble Winged gates located at the inlet end of the expansion-chamber and having corresponding Wings adapted to be arranged in alinement to form a fixed abutment contiguous to the inlet-port, means for preventing reverse rotary movement of the gates during the expansion of the motive agent, an inlet-valve controlling said port, and operating connections between the inlet-valve and the piston, the same including a rocker and a cam for actuating the rocker, substantially as specified.

8. A fluid-pressure motor having a casing, a plurality of parallel expansion-chambers located Within the casing, a piston comprising a plurality of spaced piston-heads and an endless carrier connecting the same and eX- tending at opposite sides through said eXpansion-chambers, guides for supporting the carrier, cooperating Winged gates located at the inlet end of each expansion chamber and having corresponding Wings adapted to be alined to form Xed abutments, means for temporarily locking the gates in their adjusted positions and adapted to be tripped at intervals to allow the entrance of the pistonheads successively into the expansion-chambers, and valve mechanism operatively connected With the piston for controlling inletports of the expansion-chambers, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of tWo Witnesses.

PETTER U. N. PEDERSON.

l/Vitnesses:

H. L. SMITH, N ELLIE ORToN. 

